Miller Electric Intellifire 250 - Manual (Page 15)

OM-184 227 Page 11
SECTION 5 − MAINTENANCE & TROUBLESHOOTING
5-1. Routine Maintenance
Y Disconnect power
before maintaining.
.
Maintain more often
during severe conditions.
3 Months
Clean and tighten
output connections.
Repair or replace
cracked cables
and cords.
6 Months
Replace damaged or
unreadable labels.
Blow out or vacuum
inside.
5-2. Overheating
Thermostats TP1, TP2, and TP3 protect the unit from damage due to overheating. If one or more of the heat sinks get
too hot, TP1, TP2, and/or TP3 opens and output stops. The fan keeps running to cool the heat sink(s). Wait several
minutes before trying to heat.
5-3. Automatic Shutdown Protection
This unit automatically shuts down upon sensing certain fault conditions, such as an out-of-range frequency condition,
short circuit load condition, or an open circuit (no load) condition. The unit also has automatic voltage limiting and
power ratio limiting, which limits the output power based on improper load impedance.
Ref. ST-801 826-C
Tools Needed:
5-4. Safety Interlock Switch
1 Rear Panel
2 Safety Interlock Switch
The safety interlock switch
prevents the contactor from
energizing with the wrapper off the
unit.
3/8 in
2
1